12,000.012
Five thousand two hundred thousandths in decimal form is 5.2
21.012
12.0024
Twelve and fifty-four thousandths.
12,000.012
Twelve thousand in decimal form is 12,000
4.01612
Five thousand two hundred thousandths in decimal form is 5.2
It is 12.009
Seven and seven hundred twelve thousandths would be written as 7.712The "and" tells you where the decimal goes, "thousandths" tells you how many places there will be in the decimal part of your answer (3 decimal places for thousandths), and seven hundred twelve tells you how many thousandths there will be.
12.024
12.024
21.012
0.912
12.0024
A thousand thousandths is 1, so 9000 thousandths is 9.